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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0d07fef393fefaac0a7a1118304fb7143f7334483102926050c2731b25445b3a' 
  AND token = '+t5hGRnx9v0SRn33QSxzpSGhj/9fO7DxpxAqM83/3dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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