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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5ad2fc704843d2b2b9560fdee4b8ce9ef190851e781d9b6e3ac6206b2364154' 
  AND token = '4OWxyPGNnLb8J3g3L2CEUcS9nW8QX9Z004uUWMkZx/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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