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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8a969e1e0fd00b57c07981b4388e4573e269047f3a3f85dfef54b291929570e' 
  AND token = 'P/qCxCBicbMY8wRIhdW/s0Ouu/klnxI3rC5DFuB3YHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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