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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '009c69d9d00b4ac5d4d99f8c67ecf126a612e4d94f016ba6a3f8097fd7db4006' 
  AND token = '1OQ9aamPIJiyggOkbaq020VOKEri3d7lFBWUBNB4I54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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