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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aedf92d7207351315edb2d77b09af1d7e970937a63c22486d0ef7d8a9718c7b4' 
  AND token = '7zuYz9LHw+lZFlE221Wk95kVJBBoRgeJ3yhRGOs9cSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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