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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ce53ec2da6aa609237fff3092fadb65f2f0e196ade2cc058777486d2a4c4ef9' 
  AND token = 'L0lit5GbcIj9/VzaZJz5ZTOo1q5Xb44DRqi1lS/HLFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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