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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26112c36d160dd895f47b3dddcfa4de619aa4edd9de667c986db7fcd1672347c' 
  AND token = 'UwBgd08R41aDBEQ8cOP0kQ2vltj9xRApzKI94SARDdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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