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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee2f6390d3aebac6f001d4465c86adda51bd1bcfd87ac1e9d4ef4bc287e9440b' 
  AND token = '+7h/Xnk44ozZkOLB/UF7tQ9vszdrxw5cLuXi5AY1O3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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