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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e0a1248fa89754399028aef3b2b0196f714e399bfe2c78beb68042c8e5207b8' 
  AND token = 'MPep4nPMwDk10klHDMLm0iGEC7Ld44q5PVorMFwJm2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}