SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '954a877226f6e10d4eab8969a5dad203707e4e4d855df3189f2e86f324ba82c2' 
  AND token = 'f8aAvq1XFk6QuB/C+JkFR4Dv6CGP8OwIkgvljCWzbv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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