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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17e306e952bfb0028bb468bb0bc7cb8d7561f43fb012453a9adc13ea357233fe' 
  AND token = '9SUF3sZuENtEa/kh7iQAGrQDkeF0w4edV7RpCHTJoqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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