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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a47195ae2020324a8201bb3fa11dffc629425dc21506fb2a4e9a55d427ce965' 
  AND token = '1ttM831KBZopbJmwdy+YgJoBWowKDEee+hiHiRn+2e8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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