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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '795c12fa6e77194b21c0870894fc37ef1feef4e434b5d514e3b7109dc5cdce7c' 
  AND token = 'qvm8hTOP0ZvN8ziIl+i7a0VIWfJW2P/xKXBV1bqzn/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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