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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1417b582b93154a8ae1a4c603af734da0b4f25f0ec6b1e85fdfca4a292a2895a' 
  AND token = 'jHnSvJW0wwCVZQnQuJNmx2Qal0OF888EkYE2e+3AaFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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