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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76e6d2e53db1678230219aaa6cac304ce723f3cf6d9c320b7ee0f39dc3367212' 
  AND token = '3n2IC/ZBmZGyp+fZnvGpH4M7TK31oqQLHxhi4rKQlKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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