SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0d5efb5363bd6bcf64b7626256a2deacfeea87a114306297ccf93708e346818' 
  AND token = '7YVJ4RPD4fOmpGkGJW2gPPJYw3G+QeJUpjxhV3lQNH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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