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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cee7c444c9b877218d8cc38c63960e6fdc975bb852b1d63da089c813885ba77' 
  AND token = 'HWhOe0QEW34wfKwHP34c0SPU60g0cC8gmS6RoNzwXUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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