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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd90df7339eb8a75b45d6930ee81f845439fa734cbfef35379380d9d861954c79' 
  AND token = 'oyfOLiGvOyjuD80HcGMHbzbZqJ2lU3zcnd5DC4M1SVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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