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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ef2b1a2daf8a52ac8d509a9a4eefe910ce11e887600e5f0f4209edb86f87bb0' 
  AND token = 'TPgw/3bv02zFO0aJ29e9DYxeKuBmi8RJYrKlB+cwJNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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