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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5805f622814f2ae43736144238930314c57ab206fc73aaf9d9673ba77cc7adb' 
  AND token = 'cUrxG/PFCNOt6xY7x7cK6nbvjpE9NxS3POUPgpba9Oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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