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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fab852c786ba4270d705f2af0970f50671541549b726aaa61f1468f18d70a700' 
  AND token = 'oGH2mhnOaRBa1NPVrhIv9rQVhtMYUI3EctPg5f3eLiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00105

JSON explain

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