SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0523e21bf7d09624015736e1ff99de36419cd06545f42c47fe85e48b985bd2e3' 
  AND token = 'g5O+HIBX0TQmvzdfi9z1wJvkm3+ofuZs/uVG+1SJWfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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