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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09c1d013a9913d44d75b86bdb2ede256e4c24ea274c31149a62e78710b084250' 
  AND token = 'GBZBe7RYMviSX6bYaDWEzKEGR5jTvU/dn7n5GDtpJuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00225

JSON explain

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