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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e62e52c984c2f2cbe5f9639b6d691369bccdc1e8ce833b0430e7b9ae31d77b77' 
  AND token = '3nqtYeC77eVsB1kh7b+C0Cdvoq9INdcHfmsznV026LA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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