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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a733cc4995961d11a47f3696803fefe8cfef3841c0464177769e55652820bd' 
  AND token = 'u/Rd7V0Mrwz7UxP/m58feXu1KKx+VDPZmzwcuD1895M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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