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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e39ae9b2c392c758c07d42d205965071faf36109005d2ea3379683bdc8850704' 
  AND token = 'Ddu7+43Qyr4buq+8tmMjPLThWLjrGW4N5pnxWk3wVSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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