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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60b9e57ea450930a2a3b401eeeaef4f863b6fe7fe8ebc38dc19b3e70d5047a00' 
  AND token = 'e7nVAnywqKA2CSTMzMCxXr76lga72G613X8OzepOvQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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