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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cfbe2cf2d5dfc1cb04ee1518f0813f510c7c82e06a548e049b737a12bf5fd7c2' 
  AND token = 'V7DQegT1ocVrZWuvkcGeWt47q+efAppU1SMDr4ZX8GA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}