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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c565140a9d08bf8b0f6f9ee014069c832443f1705240d55321c2f56f06fb99ce' 
  AND token = '1G9IektLuUqKH16hdsYnLo0c25f34J95QRojHpNYWB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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