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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b276f5785e77d6d17cdc31341346e86a4140055eb9e9ca287323b26014c0096' 
  AND token = 'fwHWtr/0dp9alN1UuPw0RqGr6Nfa5FyQIB/k34M5Rv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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