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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0697cdf6aaf3b2b89c7a6771f40290084253f09e90d5e818ea802b0a00841e73' 
  AND token = 'PxgWvEchrwScMRJ8AHcyZo78trGG7woBXifbKk2CJ9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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