SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c753ae06c62006b7af32b5b348faa9d803972f87cf38640e7c25317a420988a' 
  AND token = '7fFh+FlE9iaUzoszWzgBI1quZYrRhJZ2lQtLPEYYeac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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