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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06cf161b19a02ceb16f868fb3b581f94e3cdf943cf9fad555b1d5ea4badcf3ec' 
  AND token = 'hipjJbvNB7ySHmSRlNBacYJLo/jyP96ETlFLoPiTvJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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