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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f2129c152b9e4fcfe9e43fd0d5a4e265aad374abf269a4221bda1bde70b8321' 
  AND token = 'Z4zMqrp9nFqvsguL2RDkVdOSdQxLg4ATNrtC006clhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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