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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d86af8e7810419c2702c0c5aad7843540f345f561ec0c05f487a2d7dae85ad7' 
  AND token = 'aPPX4UWx4iQ2cu5PE7gEeVmr9G7zecbJZ+cLYl87Sec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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