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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd05e6a05114536298a40c2f422fd7702167728f8dba84873c691ae9f97b7c615' 
  AND token = '8CWO6kcDx1XxAdGgx8ErqMTJBimtbRd7e+SOjjNcQO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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