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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad5354a0545733b7073c6139a44b24cd0620cc6b051dfabc1545d71e1558f0f0' 
  AND token = 'HI1NJeo4+JhvGJEZfRt3oZF4phkBdiT4W7R07HioewA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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