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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a0a3bea72f27a0bb7f05ead9dc4d3f80a957761c0b93035b1c3409fe764b203' 
  AND token = 'A8cJJaB7yw9CZX3ODZmgFVn4DEvX0aCLuszLw9Ee/hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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