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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '205be586dd5fcf7d4fc4cde6e0998e9eceecd1a8decd8d8d781977a65307be7f' 
  AND token = 'ae4foel6la1mH0G2xKmwOjTxV6fI8I7dfnJmfcR09w4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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