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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a138c3f96c2663314120b6b116bfeb6c8d6e4cf0806c0d50aaeb63b64e8dc55' 
  AND token = 'gIU+s3hCmI2Eq9sLjguYg+BYmT6ZCo+qsY/jMVrVc60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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