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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd5492122edc400ccc6daef456be86fa87259570c400a41b97aa7e5318067c0' 
  AND token = 'IObo2zmFo3xQwR3059oUPy8NfOzYRORumrPSPlkAjUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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