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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '73e505dcbb8709bf2f4d4083a562573b4414237dcab9a4482ab39b4627b45f26' 
  AND token = 'pFQv8QeS4d3dpeHUzG/9vk6cBBtR5R7j6vPk5fEKUPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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