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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '795f6c593d7797ce68ca0f5de204b5aab3ddbd481c0a60df5ee7412574a50055' 
  AND token = 'Vs+IQQBBOBrOUn5C/5M193FAzKQSthkG06IcYArR1e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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