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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfde71bfbf35f9edcb0f3c7d8c8be47ed7f33f54ff526537d0b142414b22ba8e' 
  AND token = 'WftXNN3WWBScB7CyMtLJHUv7sm7Gx8YN1jOFSD9FQfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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