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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'be08694c0fd63341482ec6eaaf0b9839c586128d174c681d8f208c4c9c4568f6' 
  AND token = '0RBRKU5+ci7iF/rTLNF3kdGJVy87WZJ0NoExDf9QNuc=' 
  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"
    }
  }
}