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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98379825633d9e279aaea13432cc3fdbe0848dced7b33b35e5e45d37806ce504' 
  AND token = '1Ewvdx0c9uf5bWpm9Kd0aYZLpb+BQo6dkNdxrREDW1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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