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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a08cc954fa9f85defbf9e97ba8a8119011b5fd878b6b0903454602cc1530f8ee' 
  AND token = 'fFpLIh7ntvExwRCEGMutBy1kam9j+6bGbrSJOyfGxHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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