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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '213b170b4c66048c6af58cbcf92007b5aba60aa65fd76f1cf1f68e3910e8922c' 
  AND token = '9Hdku/iwKXr6/9/TYrDnP+IaTR8DHzHmYw5N8Pmg1i8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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