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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '610a9f8684f796720d87b59ba29ace5254b433d2e6e32d19aa7e8e72f8f11fc1' 
  AND token = 'L99XbSdvTkEeqLdkYSq0zf3Y9VtjDloMuB1HLgGdTZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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