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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e52f546338bd2c416277c551235adfeb4241853ab8c953f462a9ed6ce5210562' 
  AND token = 'Pry+Kt++2GXwcppYHdYWCW4kSkW8FHIHjL3lJ5rnLgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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