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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75c6e18429e9ec1ebb3ec5f6118322da237394652064f42ea4caa62480f1c1a9' 
  AND token = 'Wafrzck2JkwT8n2E0xmAn8AX4yCOw2Y/TA5Ah91l8zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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